A Digital Twin for Condition Monitoring of an Industrial Chain Belt Conveyor System

Chain belt conveyors have become a popular choice for transporting materials in diverse industries. The primary driving force behind these conveyors is the gearmotor, which is composed of an electric motor and a gear unit. The industrial electric motor market is estimated to be 21 billion USD and consumes up to 70\% of the electricity by the...

The Impact of Clutch Operation in Propulsion Mode Transitions

Over the coming decades the worldwide fleet of ships will have to change to reduce emissions. Hybridisation of the propulsion system is a stepping stone to full electrification, which is required to reduce emissions of the maritime sector to zero. In hybrid propulsion systems, clutches are used to switch between drive engines when transitioning...

Early Stage Fouling Effects Prediction for Yacht Design: A grey-box model approach using operational voyage data

In this thesis a grey-box model is developed to predict the power increase over time due to marine biofouling. Biofouling is known as the undesired adverse effect of living organisms growing on submerged surfaces. Fouling creates roughness on the hull and propeller and thus additional frictional resistance and loss of propeller efficiency, also...

Routing and scheduling of maintenance support vessels for an offshore wind and solar farm

Floating photovoltaic (FPV) is an emerging concept. Potential is recognized in combining FPV and off­ shore wind farms to create an offshore wind and solar farm. One of the remaining uncertainties around the potential of an offshore wind and solar farm is the value of the operations and maintenance cost. As one of the main contributing factors...

Supercapacitor energy storage for load levelling on board of diesel-electric yachts

Towards a standardized statistical correction between RANSe-based full-scale CFD and sea trial measurement

This research considers Amels LE and SX super yachts. Bare hull, appended hull, and actuator disk simulations were performed using CFD, and compared to sea trial results. The results of the CFD are unique because they were generated after the sea trials were conducted, resulting in the ship speed in CFD and sea trial being similar. The results...

Analysing the cost-effectiveness of predictive maintenance programs using a simulation cost model: A case study for the vacuum compressor pumps at Duyvis

In this thesis, a simulation cost model is presented that can be used to assess the cost-effectiveness of a selection of PdM programs. The proposed model combines a discrete event simulation (DES) model with a cost model. It is specifically designed to analyse the PdM programs for the vacuum compressor pumps at Duyvis. All the PdM programs...

Vessel-Platform Automation: Integrating self-assembly with configuration dependent control strategies

Vessel platform automation developed notably categorizable in two behaviors: reconfiguration and collaborative motion control. This work explores integration of both behaviors in a single system. Fundamental system characteristics of both behaviors are analyzed to create understanding of the varying design approaches. A multi-vessel platform...

On the effect of the heave motion on the run-up flow: The case study of a 2-D rectangular structure

Wave run-up is the vertical water uprush that occurs when an incident wave impacts on a surface-piercing body. This phenomenon is particularly relevant when waves of high steepness interact with large structures as a result of significant nonlinear interactions between incident and diffracted wave fields. The extent can be further amplificated...

Static back-pressure effects on the performance of a dual-fuel engine

The use of fossil fuels and their impact on humans and nature is becoming a bigger concern worldwide. An interesting concept to lower polluting emissions coming from maritime engines is the combined use of a dual-fuel engine and an underwater exhaust system. In the dual-fuel engine natural gas is used as the main fuel type. It is seen as a...